. >>> and during a campaign swing in north carolina, mitt romney went after the obama administration's handling of the terrorist attack in libya. romney accused the president of failing to, quote, grasp the seriousness of the incident. mitt romney will join his running mate in the state of ohio. >>> little perspective of last night's debate. it may have been contentious. but at least it didn't get physical. check out this faceoff between two veteran california democrats, running for the same seat. at one point, congressman brad sherman grabbed his opponent, congressman howard berman, and shouted, do you want to get into this? the audience, hooting and hollering, until a sheriff's deputy had to step in to separate them. >> take it out outside, fellas. it's getting hot. >>> and a dire warning about cyber security from the nation's top defense official. leon panetta says we are facing the threat of a possible cyber pearl harbor, in which foreign computer hackers take control of the power grid, transportation and financial network. a hostile group could derail a passenger train that's load